CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2024-50230 – nilfs2: fix kernel bug due to missing clearing of checked flag
https://notcve.org/view.php?id=CVE-2024-50230
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix kernel bug due to missing clearing of checked flag Syzbot reported that in directory operations after nilfs2 detects filesystem corruption and degrades to read-only, __block_write_begin_int(), which is called to prepare block writes, may fail the BUG_ON check for accesses exceeding the folio/page size, triggering a kernel bug. This was found to be because the "checked" flag of a page/folio was not cleared when it was discarded by nilfs2's own routine, which causes the sanity check of directory entries to be skipped when the directory page/folio is reloaded. So, fix that. This was necessary when the use of nilfs2's own page discard routine was applied to more than just metadata files. • https://git.kernel.org/stable/c/8c26c4e2694a163d525976e804d81cd955bbb40c https://git.kernel.org/stable/c/994b2fa13a6c9cf3feca93090a9c337d48e3d60d https://git.kernel.org/stable/c/64afad73e4623308d8943645e5631f2c7a2d7971 https://git.kernel.org/stable/c/aa0cee46c5d3fd9a39575a4c8a4f65f25f095b89 https://git.kernel.org/stable/c/f05dbebb8ee34882505d53d83af7d18f28a49248 https://git.kernel.org/stable/c/cd0cdb51b15203fa27d4b714be83b7dfffa0b752 https://git.kernel.org/stable/c/f2f1fa446676c21edb777e6d2bc4fa8f956fab68 https://git.kernel.org/stable/c/56c6171932a7fb267ac6cb4ff8759b93e •
CVSS: -EPSS: 0%CPEs: 9EXPL: 0CVE-2024-50229 – nilfs2: fix potential deadlock with newly created symlinks
https://notcve.org/view.php?id=CVE-2024-50229
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix potential deadlock with newly created symlinks Syzbot reported that page_symlink(), called by nilfs_symlink(), triggers memory reclamation involving the filesystem layer, which can result in circular lock dependencies among the reader/writer semaphore nilfs->ns_segctor_sem, s_writers percpu_rwsem (intwrite) and the fs_reclaim pseudo lock. This is because after commit 21fc61c73c39 ("don't put symlink bodies in pagecache into highmem"), the gfp flags of the page cache for symbolic links are overwritten to GFP_KERNEL via inode_nohighmem(). This is not a problem for symlinks read from the backing device, because the __GFP_FS flag is dropped after inode_nohighmem() is called. However, when a new symlink is created with nilfs_symlink(), the gfp flags remain overwritten to GFP_KERNEL. Then, memory allocation called from page_symlink() etc. triggers memory reclamation including the FS layer, which may call nilfs_evict_inode() or nilfs_dirty_inode(). And these can cause a deadlock if they are called while nilfs->ns_segctor_sem is held: Fix this issue by dropping the __GFP_FS flag from the page cache GFP flags of newly created symlinks in the same way that nilfs_new_inode() and __nilfs_read_inode() do, as a workaround until we adopt nofs allocation scope consistently or improve the locking constraints. • https://git.kernel.org/stable/c/21fc61c73c3903c4c312d0802da01ec2b323d174 https://git.kernel.org/stable/c/076e4ab3279eb3ddb206de44d04df7aeb2428e09 https://git.kernel.org/stable/c/cc38c596e648575ce58bfc31623a6506eda4b94a https://git.kernel.org/stable/c/a1686db1e59f8fc016c4c9361e2119dd206f479a https://git.kernel.org/stable/c/c72e0df0b56c1166736dc8eb62070ebb12591447 https://git.kernel.org/stable/c/69548bb663fcb63f9ee0301be808a36b9d78dac3 https://git.kernel.org/stable/c/58c7f44c7b9e5ac7e3b1e5da2572ed7767a12f38 https://git.kernel.org/stable/c/1246d86e7bbde265761932c6e2dce28c6 •
CVSS: -EPSS: 0%CPEs: 2EXPL: 0CVE-2024-50227 – thunderbolt: Fix KASAN reported stack out-of-bounds read in tb_retimer_scan()
https://notcve.org/view.php?id=CVE-2024-50227
In the Linux kernel, the following vulnerability has been resolved: thunderbolt: Fix KASAN reported stack out-of-bounds read in tb_retimer_scan() KASAN reported following issue: BUG: KASAN: stack-out-of-bounds in tb_retimer_scan+0xffe/0x1550 [thunderbolt] Read of size 4 at addr ffff88810111fc1c by task kworker/u56:0/11 CPU: 0 UID: 0 PID: 11 Comm: kworker/u56:0 Tainted: G U 6.11.0+ #1387 Tainted: [U]=USER Workqueue: thunderbolt0 tb_handle_hotplug [thunderbolt] Call Trace: <TASK> dump_stack_lvl+0x6c/0x90 print_report+0xd1/0x630 kasan_report+0xdb/0x110 __asan_report_load4_noabort+0x14/0x20 tb_retimer_scan+0xffe/0x1550 [thunderbolt] tb_scan_port+0xa6f/0x2060 [thunderbolt] tb_handle_hotplug+0x17b1/0x3080 [thunderbolt] process_one_work+0x626/0x1100 worker_thread+0x6c8/0xfa0 kthread+0x2c8/0x3a0 ret_from_fork+0x3a/0x80 ret_from_fork_asm+0x1a/0x30 This happens because the loop variable still gets incremented by one so max becomes 3 instead of 2, and this makes the second loop read past the the array declared on the stack. Fix this by assigning to max directly in the loop body. • https://git.kernel.org/stable/c/ff6ab055e070d819f51196622e08f8941b6d2a4b https://git.kernel.org/stable/c/08b2771e9270fbe1ed4fbbe93abe05ac7fe9861d https://git.kernel.org/stable/c/e9e1b20fae7de06ba36dd3f8dba858157bad233d •
CVSS: 7.8EPSS: 0%CPEs: 3EXPL: 0CVE-2024-50226 – cxl/port: Fix use-after-free, permit out-of-order decoder shutdown
https://notcve.org/view.php?id=CVE-2024-50226
In the Linux kernel, the following vulnerability has been resolved: cxl/port: Fix use-after-free, permit out-of-order decoder shutdown In support of investigating an initialization failure report [1], cxl_test was updated to register mock memory-devices after the mock root-port/bus device had been registered. That led to cxl_test crashing with a use-after-free bug with the following signature: cxl_port_attach_region: cxl region3: cxl_host_bridge.0:port3 decoder3.0 add: mem0:decoder7.0 @ 0 next: cxl_switch_uport.0 nr_eps: 1 nr_targets: 1 cxl_port_attach_region: cxl region3: cxl_host_bridge.0:port3 decoder3.0 add: mem4:decoder14.0 @ 1 next: cxl_switch_uport.0 nr_eps: 2 nr_targets: 1 cxl_port_setup_targets: cxl region3: cxl_switch_uport.0:port6 target[0] = cxl_switch_dport.0 for mem0:decoder7.0 @ 0 1) cxl_port_setup_targets: cxl region3: cxl_switch_uport.0:port6 target[1] = cxl_switch_dport.4 for mem4:decoder14.0 @ 1 [..] cxld_unregister: cxl decoder14.0: cxl_region_decode_reset: cxl_region region3: mock_decoder_reset: cxl_port port3: decoder3.0 reset 2) mock_decoder_reset: cxl_port port3: decoder3.0: out of order reset, expected decoder3.1 cxl_endpoint_decoder_release: cxl decoder14.0: [..] cxld_unregister: cxl decoder7.0: 3) cxl_region_decode_reset: cxl_region region3: Oops: general protection fault, probably for non-canonical address 0x6b6b6b6b6b6b6bc3: 0000 [#1] PREEMPT SMP PTI [..] RIP: 0010:to_cxl_port+0x8/0x60 [cxl_core] [..] Call Trace: <TASK> cxl_region_decode_reset+0x69/0x190 [cxl_core] cxl_region_detach+0xe8/0x210 [cxl_core] cxl_decoder_kill_region+0x27/0x40 [cxl_core] cxld_unregister+0x5d/0x60 [cxl_core] At 1) a region has been established with 2 endpoint decoders (7.0 and 14.0). Those endpoints share a common switch-decoder in the topology (3.0). At teardown, 2), decoder14.0 is the first to be removed and hits the "out of order reset case" in the switch decoder. The effect though is that region3 cleanup is aborted leaving it in-tact and referencing decoder14.0. • https://git.kernel.org/stable/c/176baefb2eb5d7a3ddebe3ff803db1fce44574b5 https://git.kernel.org/stable/c/8e1b52c15c81106456437f8e49575040e489e355 https://git.kernel.org/stable/c/78c8454fdce0eeee962be004eb6d99860c80dad1 https://git.kernel.org/stable/c/101c268bd2f37e965a5468353e62d154db38838e https://access.redhat.com/security/cve/CVE-2024-50226 https://bugzilla.redhat.com/show_bug.cgi?id=2324876 • CWE-416: Use After Free •
CVSS: -EPSS: 0%CPEs: 2EXPL: 0CVE-2024-50225 – btrfs: fix error propagation of split bios
https://notcve.org/view.php?id=CVE-2024-50225
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix error propagation of split bios The purpose of btrfs_bbio_propagate_error() shall be propagating an error of split bio to its original btrfs_bio, and tell the error to the upper layer. However, it's not working well on some cases. * Case 1. Immediate (or quick) end_bio with an error When btrfs sends btrfs_bio to mirrored devices, btrfs calls btrfs_bio_end_io() when all the mirroring bios are completed. If that btrfs_bio was split, it is from btrfs_clone_bioset and its end_io function is btrfs_orig_write_end_io. For this case, btrfs_bbio_propagate_error() accesses the orig_bbio's bio context to increase the error count. That works well in most cases. • https://git.kernel.org/stable/c/852eee62d31abd695cd43e1b875d664ed292a8ca https://git.kernel.org/stable/c/22833d89b780ba0f9f66e19c477e7decf638edce https://git.kernel.org/stable/c/d48e1dea3931de64c26717adc2b89743c7ab6594 •